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CHARLES E. RANDALL, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE HANCOCK INSPIRATOR COMPANY, OF SAME PLACE.

lNJECTOR.

SPECIFICATION forming part of Letters Patent No. 378.403, dated February 21, 1888,

Application filed September 6,18%. Serial No. 212.815. (Model.)

To zZ-Z whom it may concern.-

Be it known that I, Galleries E. RANDALL, of Boston, in the county of Suffolk, and in the State of Massachusetts, have invented certain new and useful Improvements in Injectors for Feeding Water to Steam-Boilers; and l do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which- Figure lshows a sectional view ofthe Hancock inspirator, as known to the trade, with my invention applied thereto; and Fig. 2, a detail view of a modified form of valve.

Letters of like name and kind refer to like parts in each of the figures.

The object of my invention is to provide an improvement on the Hancock inspirator, as shown and described in United States Patent No. 185,861, January 2, 1877; and my invention relates particularly to an improved steam-admission valve and ports in the same, whereby the admission of steam to the apparatus is controlled by the operator; and to this end my invention consists in the improvements as hereinafter set forth and more particularly poi ntcd out in the claims.

ln the drawings, A A and B B designate the lifting-tubes of the inspirator, and C C and D D' the forcing-tubes of the same.

The passages and conduits for admitting and conducting the steam to the lifting and forcing tubes and the water-supply overflow and deliveryconduits need not be particularly de scribed herein, as they can be much varied without departure 'from my invention.

E designates the steam supply passage adapted to be connected by a suitable pipe Withr the boiler. Cutting ofi` this passage from the passage E', for conducting the steam to the lifter steanrtubc A A of the liftenis the partition F, having in it the portf. A valve,F,attached to stem G', serves to open and close this port. Said port is ou its inner side provided with the conical valveseatf', and the valve itself is provided with a correspond inglyshaped seating-surface, f, to engage such seat. Bigidly connected with valve F, by means of the stem G, is the pistonvalve head H, fitting and slidingin the cylindrical passage H between the space h, which communicates with the valve-portf when valve F' is opened, and the passage K, for conducting steam to the forcer. At the sides of the valvepassage H are ports h h', communicating with the steampassage K. With this construction, when the valve Fis seated so as to close port f, steam is shut off from both the lifter and forcer tubes.

As a means for moving the valves l?" and H, l have provided the outwardly-proj ecting stem L, connected with them, threaded at L', and at its outer end provided with a suitable turning handle, L2. This stem passes through a threaded nut, L3, screwed to the casing, the threaded portion of the stem engaging the threads within the nut. A stuffing-box cap, M, lits the stem and is screwed upon the outer end of nut- L3.

The valve F is smaller in area than the 'piston-valve head H, as shown clearly in the drawings, and is on the side of its valveport opposite to the entrance chamber or passage for the steam from the source of supply. The result of this construction and arrangement is that as the valve is being seated the steampressure against the end of the valve is only proportional to the smallest area of the valveseat, so that there is less wear upon the screwthread of the valve-stem than in the doubleseated val ves heretofore used for the same purpose.

Vhere, as heretofore, the valve for shutting off the steam from the lifting or forcing devices, or both, has been placed on the steamadmission side of the valve-port, the pressure of the steam has been brought to bear directly upon the greatest area of the valve-head when the valve was closed.

As the area. of the valve pressed upon by the steam was necessarilylarge, the pressure upon the valve when closed or nearly closed has been so great as to cause much wear of the screw-threads on the stem, as well as to make the movement ofthe valve different.

Vith my construction and arrangement of 95 valves the smallest arca ofthe valves is presented to the pressure of the entering stea m, so that the movement of the valve is made much more easy than with the valves arranged as hereto fore-for instance, as in Letters Patent No. 239,326, dated March 29, 1881.

The full pressure ofthe steam from the boiler IOC) does not act upon the piston-valve H, as] of the proper seating of both valves in case when valve F is open the steam has free passage down through thetube or passage E to the lifter-tubes.

Ihave shown my injector as provided with an intermediate overiiow valve, O, on the threaded stem O whose threaded portion passes through a threaded nut, O2. rIhe outer portion of the stem passes through a stuffingeap, O, screwed on the the nut O2 and tting the stem, and its outer end is provided with a suitable handle, O4. rlhe valve itself is preferably made conical, as shown, the valve-seat O5 therefor being correspondingly shaped. The valve opening or port closed by the valve O connects the water-passage around the forcing-tube D D with the passage into which the discharge or lower end of such tube opens and which is connected with the delivery and overilow pipes or passages, as shown.

The pipe market overflow 7 on the drawings is to have the usual final overflow-valve, though such is not shown.

The operation ofthe injector with the valves,

as shown and described hereinbefore, is as follows: The intermediate and final overflowvalves being open an d thevalve F being closed, when the operator gives the valve-stem L a slight turn steam is admitted directly to the lifting injector-tubes, and the air will be eX- pelled from the apparatus and exhausted from the suction-pipe communicating with the well orother source o f supply of water. Water will then be drawn from the well through the suction-pipe, and `passing through the apparatus will be discharged through the open overliow-valves. The intermediate overflowvalve, O, is then closed and the valve-stem L is turned farther, so that the piston-valve head II opens the ports 7i h', admitting the steam into passage K, and so to the forcing injector-tubes C C and D D. The forcing part of the injector having been thus thrown into operation, the final overiiow-valve is closed, and the full current will be established through' the delivery-pipe and water will be fed into the boiler. The final overflowvalve, which is such as is always provided with an inspirator, can be, if desired, located directly on or in the delivery-pipe instead of on the overflow-pipe, arranged as shown in the drawings, and connected with the deliverypipe.

Instead of employing the piston valve H as a second valve, a puppet-valve similar to valve F can be used, as shown in Fig. 2. In this case the prolongation of the stem L at G is made to slide through the second valve, so that the first orinlet valve can be opened before the second valve. A pin, g, on the portion G of the stem will, by the movement of the stem through the second valve, be brought into contact with the valve to move it. A flat spring or elastic washer of metal or rubber is placed around the stem between the secend valve and a shoulder on the stern to allowl they should not be accurately adjusted when made or should wear unevenly.

Having thus described my invention,what I claim isl. In an injector provided with the steaminlet-valve opening, the passage 7i, in communication with the lifter steam-jet tube, and a port or ports connecting such passage with a passage leading to the forcer steam-jet tube, the valve for closing the inlet-valve opening on the inner side thereof, the valve for closing port or ports leading from passage h, con- .nected rigidly with the former valve, and means for moving the valves, substantially as and for the purpose specified.

2. In an injector provided with the inlet portf, the passageh, into which the port admits steam, and one or more ports, h', open` ing from such passage, the vvalve F', for closing the discharge side of the inlet-port, the valve H, connected with valve F, and means for movingthe valves, substantially as and for the purpose shown.

3. In combination with the inlet-portf, passage h, into `which the portj' admits steam, in communication with the lifter steam-jet tube, one or more ports, h', leading from passa-ge 7i and communicating with the forcer steam-jet tube, the valve F on the inner or discharge side of portf, and the valve H, connected with valve F and adapted to close ports h and keep them closed while the valve F is moved sufficiently to open portf, and to unclose them upon furthermovement of the valves, substantially as and for the purpose set forth.

4. ,In antinjector, in combination with the steam-inlet port f, the passage h,into which the port f admits steam, and the ports h h', the valve F on the inner or discharge side of port f, the piston-valve head H, the stem connectlOO ing the two valves, and means, substantially as described, for operati ng the valves, substantially as and for the purpose' described.

5. In an injector provided with a steam-inlet-valve opening, a passage communicating therewith and with the lifter steam-jet tube, and a second valve-opening connecting such passage with a passage leading to the forcer steam-jet tube, a valve controlling the inletvalve opening located on the discharge side thereof, and a second valveconnectedwith the former and controlling thesecond valve-opening, and means, substantially as described, for operating the valves,whereby the second valve shall be and remain closed, except when the first or inlet valve is wide open, substantially as and for the purpose set forth.

In testimony that Iclai ni the foregoing I have hereunto set my hand this 27th day of July, A. D. 1886.V

CHARLES E. RANDALL.

IIO 

